To create a book paper with reflection emission corresponding to the eyes optimal adoption wavelengths and thus increase the contrast in between the printed material and the substrate. This means that people, especial elderly, will have increased reading possibility at advanced ages.

To transform the high frequency visible light and UV light to wavelength around 550nm and thus also reduce the hazardous blue light around 440 nm which will prevent macular degeneration(AMD) and thus development of cataracts.